I use the devices "DeVita Ritm" and "DeVita AP" more than a year is very active. Sore throat, sinusitis, tracheitis were constant companions in my life, even in summer. By purchasing equipment from May 2015 was never sick colds and viral diseases. He was picked up by an individual set to improve health programs for infectious diseases, spinal cord injuries, headaches, arthritis, and arthritis when, in infectious diseases. All programs have given very good results! I am very happy that I use devices. Many thanks. Good luck and prosperity to you !!!